LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2009 >> EX35 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System >> Power Distribution System >> Component Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis Procedure

  1. CHECK BCM OUTPUT
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector and IPDM E/R connector.
    3. Check voltage between IPDM E/R harness connector and ground.
      TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      IPDM E/R
      Connector Terminal
      E5 28 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

  2. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)
    1. Disconnect IPDM E/R connector and BCM connector.
    2. Check continuity between IPDM E/R harness connector and push-button ignition switch harness connector.
      TERMINALS CONTINUITY REFERENCE CHART

      IPDM E/R Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      E5 28 M50 4 Existed
    3. Check continuity between IPDM E/R harness connector and ground.
      TERMINALS CONTINUITY REFERENCE CHART

      IPDM E/R Ground Continuity
      Connector Terminal
      E5 28 Not existed

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness or connector.

scientia non olet · About LEMON Manuals